Feed-controlling mechanism for punching-presses.



A. WILZIN.

FEED CONTROLLING MECHANISM FOR PUNGHING mmssss.

APPLICATION FILED JAN. 30, 1914.

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m M W M Patented Dec. 22, 1914.

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THE NORRIS PETERS co PHOTO-LlfHQ. WASHING roN D 4,.

A. WILZIN.

FEED CONTROLLING MECHANISM FOR PUNGHING PRESSES.

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APPLICATION FILED JAN. 30, 1914' Patented Dec. 22, 1914.

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"HE NORRIS PETERS CO" PHUTO-LITHO. WASHINGTON. D L.

FRANCE, ASSIGNOR TO E. W. BLISS COMPANY, OF

ARTHUR WILZIN, OF ST. OUEN,

BROOKLYN, NEW YORK, A CORPORATION OF WEST VIRGINIA.

' FEED-CONTROLLING MECHANISM FOR PUNGHING-PRESSES.

Specification of Letters Patent. Patented Dec. 22, 1914:.

Application filed January 30, 1914. Serial No. 815,403.

To all whom it may concern:

Be it known that I, ARTHUR WILZIN, a citizen of the United States,residing at present in St. Ouen, Seine, France, have invented certainnew and useful Improvements in Feed-Controlling Mechanism forPunching-Presses, of which the following is a specification.

The present invention relates to improvements in hand-actuatedstaggering feeds as applied to punching presses for the purpose ofblanking or simultaneously blanking and shaping out of sheets, objectssuch as disks or boxes with a view of reducing to a strict minimum, thescrap between adjoining cuts by interposing the cuts of the successiveparallel. rows in the sheet.

The purpose of the invention is to render less liable to wear the organwhich determines the lateral distance between the punchings in the samerow; also and by the same means to allow the sheet carrier toaccommodate itself to the height variations of the dies arising from thewear of its cutting edges, and in its preferred form, to render itpossible for the operator to not interrupt the continuous running of thepress, which interruption has been inevi table at the end of each row upto now in feeds of this kind owing to the fact that a double handactuated manipulation had then to be performed, namely releasing of themechanism which determines the distance of the sheet carrier from thetool and its lateral shifting by one half of the distance betweensuccessive lateral cuts so as to determine the interposed or staggeredposition. This interruption, involving the loss of five or siX pressstrokes at each end of a row, accounts for at least 25% less output thanwould otherwise be possible. The feed in its preferred form as describedherein renders this interruption unnecessary, thus greatly increasingthe output.

The invention is represented, but only by way of example, in the annexeddrawing, in which:

Figure 1 is a perspective view of the new apparatus. Fig. 2 is a sectionof a detail, made on a larger scale. Figs. 3 and 4 represent inelevation and in plan a variation.

In the drawing manually actuated apparatus for cutting metallic sheetsin staggered rows is shown. In Figs. 1 and 2, the sheet or metallic leafa, which is presented to the press 7), is shown held by two pincers 0carried by a carriage d, a lever (Z allows of opening or closing thesepincers at will. A roller 6 restingupon the feed table f of the machinesupports this carriage or sheet carrier and allows of shifting itwithout effort. This shifting is efl'ected by means of a handle 9 whichthe workman holds as the drawing shows.

The carrier (Z is guided by shaft h which presents cylindrical bosses h,72?, Fig. 2; the separation of these bosses, reckoned from axis to axis,is equal to the separati on of the centers of the holes to be pierced.The part it can be considered as a rack-bar in. the form of a shaft,circumferentially notched to suit the lateral division or separation ofthe centers. The shaft has associated with it means for imparting to itvarying positions around its axisso as to present successive varyingcontact surfaces to the action of the dog (presently to be described)which cooperates with the divisional notches, thus reducing the tendencyto wear. The sheet carrier is hand controlled and is oscillatorilvdisposed on the rack-bar or notched shaft. The shaft is shown disposedtransversely of the machine,

and the carrier, provided with sheet-holding means, is mounted on suchshaft for movement transversely of the machine. there being meansassociated with the shaft for controlling the transverse movement of thecarrier.

A dog illustrated in the form of a bolt 2' capable of sliding in asocket 7' of the carriage (Z is supported by a spring 2" against theshaft h, for engaging the rack-bar or notches of such shaft; a pliabletransmission actuated by the press itself raises the bolt at each blowof the press. The dog or bolt is adapted to swivel upon the shaft. theposition. of the dog axially of the shaft remaining constant.

Shaft it carries two toothed wheelsl keyed upon it; these wheels orpinions mesh with the two parallelfixed racks m. The pinions serve torotate the shaft and cause its move ment longitudinally of the machineto be parallel with itself. It tends to be brought back against theworkman by the counter weights n acting against the cables n passingover pulleys n Upon one extremity of the shaft it is idly mounted a pawl16 the extremities of which can engage in the notches 0 which present astraight edge 7 forming one of the borders of the table. These notchesare at a distance equal to the separation of the rows of holes. The pawlcan be disengaged by means of a lever r.

Plates 9 accompanying the shaft it prevent the latter from beingdisplaced vertically.

The operation is as follows :-Assu1ne that the pawl t be engaged in anotch 0 and that the car (Z is at one extremity of the shaft h, forexample, at its left extremity. The workman then acts upon the handle 9exerting thereby a traction toward the right (toward the left in Fig.2). At the moment of the stroke of the press the spring controlled dog2' is automatically raised at the blows of the press, and the sheetcarrier ceases for an instant to be held. Under the effect of the pullof the workman the sheet carrier is shifted toward the right, but it isstopped by the dog 2' which redescends and hits against the followingboss. The car is thus then shifted along the shaft it, between two blowsof the press, by a length equivalent to the distance of two holes of theplate to be cut out. Nhen the sheet carrier reaches the right extremityof the division, the workman pushes before him until the pawl. 25 fallsinto the following notch where it rests supported under the action ofthe counterweights. The workman then pulls upon the handle (7 in theopposite direction, that is to say, toward the left, and thesheet-carrier advances division by division toward the left as before.But as the dog 2 now abuts against the other faces of the bosses 71 75if, the blows of the punch are now staggered as regards those of thepreceding row. The table can be horizontal or inclined. If it ishorizontal, as in the case of the drawing, the throwing out of thepieces formed is brought about by a blast of air coming from the nozzle8. If it is inclined, the throwing out is done by gravity. As isunderstood by what precedes the operator has only to act upon the handle9 in the desired direction; there is only then a single hand in use.This simplification of the movements to be effected allows of workingwith great rapidity. The return empty is also very rapid. As the car canturn about the division shaft the new arrangement is easily adapted toall tools although the level thereof may be variable. At each advance ofthe sheet-carrier parallel. to the racks, the shaft It turns upon itselfand this changes the point of contact with the dog 2' and diminishes thewear. The shaft h guided by the pinions Z meshing with the racks remainsperforce parallel to itself. Finally the surface of the table isperfectly smooth and the sheet does not run the risk of butting duringthe various movements of the carrier.

The invention in its preferred form is represented by Figs. 3 and at,where the feed-carrier is constantly urged toward the tool by twocounter-weights n. The pawl t is in the form of a hook and engages inthe notches o of a suitable form made in the straight edge 79. The twoplates 9 carry a shaft 14 on the extremity of which is keyed a lever 4which controls by the intermediation of a small rod or link 11, the pawl25. The other levers :0 are fixed upon the shaft a at points suitablychosen and each carries a finger y.

lVhen the car carrying the pincer-s, the sheet carrier, reaches the endof the course upon the rack-bar or shaft, and when. its dog or bolt 2',controlled by the pliable transmission, is raised, a small lever 2carried by this bolt, abuts against the finger 3 of the lever a2, raisesit also and brings about the disengagement of the pawl 25,- thecounter-weights a carry the ensemble forward one division.

It is evident that at each extremity of the course of the sheet-carrier,this movement being automatically produced obviates a special effort onthe part of the workman and allows a complete punching of the sheetwithout the necessity of stopping the press at the end of each row.

The arrangements above are given only by way of example; the shapes,dimensions and arrangements of detail can vary according tocircumstances without changing the principle of the invention.

I claim 1. In a device of the character specified, the combination witha punching press of a sheet carrier, a rack bar in the form of a shaftcircumferentially notched to suit the lateral divisions, a dogforengaging the said notches, and the carrier being adapted to swivel uponsuch shaft to accommodate itself to height variations of the die of thepress, the position of the dog axially of the shaft remaining constant.

2. In a device of the character specified, the combination with apunching press of a sheet carrier. a rack bar in the form of a shaftcircumferentially notched to suit the lateral divisions, a dog forengaging the said notches, and the carrier being adapted to swivel uponsuch shaft to accommodate itself to height variations of the die of thepress, the position of the dog axially of the shaft remaining 01 nstant,and means of imparting to said shaft varying positions around 1ts axisso as to present successive varying contact surfaces to the action ofthe dog which cooperate with its divisional notches, thus reducing theirtendency to wear. 7

3. In a device of the character specified, the combination with anotched division shaft of a sheet carrier oscillatorily disposed on saidshaft, a dog carried by said carrier for engaging the notches of theshaft, means for holding the shaft in proper position relatively to saidpunching tool, and means for actuating said locking device for releasingthe shaft and the carrier at the end of each row of punchings.

4. In a device of the character specified, the combination with apunching press of a circumferentially notched shaft, a sheet carriermounted upon said shaft, a dog associated with said carrier for engagingthe notches of the shaft, racks upon the press, and pinions fast uponthe shaft and meshing with the racks for changing the wearing surfacesof the notches presented to the dog.

5. In an apparatus for punching sheets in staggered rows, thecombination with a carrier provided with sheet holding means, of a shaftdisposed transversely of the machine and upon which shaft the carrier ismounted for movement transversely of the machine, means for guiding saidshaft longitudinally of the machine, and means associated with the shaftfor controlling the said transverse feed movement of the carrier.

6. In a device of the character specified, the combination with a rackshaft, means for moving the said shaft parallel to itself, a carriermounted upon said shaft and adapted to traverse the same, a springpressed dog for engaging the rack, and means for automatically releasingthe dog at the successive blows of the press.

7. In a device of the character specified, the combination of a rack barin the form of a shaft provided with circumferential notches, means formoving said rack bar parallel to itself, a carrier mounted upon saidrack bar, a dog for engaging said notches, and means for raising the dogat the blows of the press.

8. In a device of the character specified, the combination with a rackbar in the form of a shaft provided with circumferential notches, meansfor moving the said rack bar parallel to itself, a carrier mounted uponsaid rack bar, a dog for engaging said notches, means of raising the dogat the blows of the press, and a handle upon the carrier.

9. In manually actuated apparatus for cutting metallic sheets instaggered rows, the combination with a carrier provided with sheetholding pincers, a notched shaft mounted upon the machine for movementparallel to itself, a spring controlled dog, and means actuated by thepress for automatically raising the dog at the blows of the press forpermitting the advance of the carrier step by step upon the shaft.

10. In a device of the character specified, the combination with a rackbar in the form of a shaft provided with circumferential notches, meansfor moving said rack bar parallel to itself, a carrier mounted upon saidrack bar, a dog for engaging said notches, means for raising the dog atthe blows of the press, pinions carried by the shaft, racks for theengagement of said pinions whereby the shaft is rotated upon the forwardmovement of the carrier.

11. In a device of the character specified, the combination with a rackbar in the form of a shaft provided with circumferential notches, meansfor moving said rack bar parallel to itself, a carrier mounted upon saidrack bar, a dog for engaging said notches, means for raising the dog atthe blows of the press, means for controlling the longitudinal movementof the carrier, and means associated with the dog for releasing the sameat the end of eachrow of punchings.

12. In a feed controlling mechanism for punching presses the combinationwith a rack shaft, of a sheet carrier mounted thereon, a dog associatedwith the carrier for engaging the teeth of the rack, means for actuatingthe dog in proper timing relatively to the punching of the sheet, meansfor controlling the longitudinal movement of the carrier, and meansassociated with the dog for actuating the same upon the limits of thelateral excursions of the carrier.

13. The combination with a punching press, of a feed table, a rack bardisposed transversely thereof, means for guiding the rack barlongitudinally of the table, a carriage mounted on the rack bar, a dogon the carriage for engaging the rack bar, means for moving the carriageand rack bar forward longitudinally of the feed table, a pawl and rackassociated with the carriage and the feed table for controlling theforward advance of the carriage, means for raising the said dog at thesuccessive blows of the press, and means associated with such dog forraising the said pawl at the completion of each transverse row ofpunchings.

14. In a device of the character specified, the combination with apunching press, of a feed table, a rack bar mounted transverselythereof, means for moving the rack bar longitudinally of the feed table,a carriage mounted upon said rack bar, a dog on the carriage forengaging the notches of the rack bar, means for raising the dog atsuccessive actions of the punch, a pawl carried by the carriage, a rackupon the feed table for engaging such pawl for controlling the forwardadvance of the carriage, means 10- In Witness whereof, Ihave hereuntosigned Gated at each end of the rack bar and 10- my name in the presenceof two subscribing cated 1n posltlon to be engaged by the dog witnesses.

in its elevation after completing the last ARTHUR WILZIN. punch in a rowof punchings for actuating Vitnesses:

the pawl and permitting the advance of the FERDINAND JOHN,

carriage. HANSON C. COXE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioneraid-Patents,

' Washington, D. C. Y

